package com.itheima.filter;

import com.itheima.pojo.User;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(value = "/index.html", dispatcherTypes = {DispatcherType.FORWARD, DispatcherType.REQUEST})
public class IndexFilter implements Filter {
    public void destroy() {
    }
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("user");
        if (user == null) {
            //session.setAttribute("OldUrl",request.getContextPath());
            request.getRequestDispatcher("/login.html").forward(request, response);
            //response.sendRedirect(request.getContextPath()+"/login.html");
            //response.sendRedirect(request.getContextPath()+"login.html");
            return;
        }
        chain.doFilter(request, response);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
